GAL ZOPHC Master layer 20170804

Abstract

The dataset was derived by the Bioregional Assessment Programme from multiple source datasets. The source datasets are identified in the Lineage field in this metadata statement.

The processes undertaken to produce this derived dataset are described in the History field in this metadata statement.

The final Zone of Potential Hydrological Change (ZPHC) is a union of the groundwater ZPHC and suface water ZPHC, which in turn were derived from groundwater and surface water impact modelling. The groundwater component of the ZPHC is where the the probability 5% or greater of equalling or exceeding 0.2m drawdown and is derived from the 95th Quantile layer.

The surface water component of the ZoPHC is derived from the reaches that are deemed impacted from the surface water modelled (sometimes referred to as Step 1 reaches) as well as additional non modelled reaches that are deemed to be potentially impacted due to interactions with the GW drawdown layer (aka Step 2) or proposed mine operations at the surface (aka Step 3). How these are derived are expanded on in the History section of the metadata.

The SW ZoPHC is created from AU cells that intersect any of the impacted stream lines (from steps 1-3 above) as well as those which intersect GDE landscapeclass singlepart polygons withing 150m of the impacted stream lines.

Some manual post processing edits were undertaken to remove anomalous AU cells. Importantly the ZoPHC_source_AU_master contains the reach id to which an Assessment Unit (AU) is allocated.

Important note: an AU is only allocated to a reach if it is within the SW ZoPHC

Dataset History

GW ZoPHC

A CON statement in ArcGIS Spatial Analyst was used to extract the area of the 95th quantile raster layer where drawdown was >= 0.2m. The resulting integer zone grid was vectorised into a shapefile. An anomalous zone on the SW boundary of the subregion that was an artefact of the modelling was deleted. The result is the GW ZoPHC

SW ZoPHC

Potentially impacted reaches were extracted from Interpoloted Reaches. These are line features where "SW_ZoPHC" = 'yes' or 'part'. From these extracted "impacted" reaches, the line features classified as "part" were manually edited (cut) according to the description in the HRV (Hydrological Response Variables). This typically involved trimming the line back only to that in or downstream of the GW ZoPHC extent. Also some "part" impacted line features were cut where they intersected existing (i.e. baseline) open cut pits (OC). . Streams that where inside or downstream of the GW ZoPHC were selected and underwent the same Baseline open pit excision process as above.

The final Zone of Potential Hydrological Change (ZPHC) is a union of the groundwater ZPHC and surface water ZPHC, which in turn were derived from groundwater and surface water impact modelling.

Dataset Citation

Bioregional Assessment Programme (2017) GAL ZOPHC Master layer 20170804. Bioregional Assessment Derived Dataset. Viewed 12 December 2018, http://data.bioregionalassessments.gov.au/dataset/df8b3c90-0d00-4502-89d5-51df4203f0bd.

Dataset Ancestors

• Derived From Galilee Drawdown Rasters

• Derived From Galilee Groundwater Model, Hydrogeological Formation Extents v01

• Derived From Galilee groundwater numerical modelling AEM models

• Derived From GAL Surface Water Reaches for Risk and Impact Analysis 20180803

• Derived From Galilee tributary catchments

• Derived From Geofabric Surface Cartography - V2.1.1

• Derived From Stream gauges for the Galilee surface water model calibration

• Derived From GEODATA 9 second DEM and D8: Digital Elevation Model Version 3 and Flow Direction Grid 2008

• Derived From Multi-resolution Valley Bottom Flatness MrVBF at three second resolution CSIRO 20000211

• Derived From GAL Aquifer Formation Extents v01

• Derived From GAL Aquifer Formation Extents v02

• Derived From Seven coal mines included in Galilee surface water modelling

• Derived From Queensland wetland data version 3 - wetland areas.

• Derived From GAL_IMIA234_FootprintsIMIA_20170525

• Derived From Geofabric Surface Cartography - V2.1

• Derived From Galilee model HRV receptors gdb

• Derived From QLD Exploration and Production Tenements (20140728)

• Derived From Galilee drawdown grids

• Derived From China Stone Coal Project initial advice statement

• Derived From Geoscience Australia GEODATA TOPO series - 1:1 Million to 1:10 Million scale

• Derived From GAL Assessment Units 1000m 20160522 v01

• Derived From GEODATA TOPO 250K Series 3, File Geodatabase format (.gdb)

• Derived From GEODATA TOPO 250K Series 3

• Derived From Phanerozoic OZ SEEBASE v2 GIS

• Derived From Landscape classification of the Galilee preliminary assessment extent

• Derived From GAL262 mine footprints

• Derived From Onsite and offsite mine infrastructure for the Carmichael Coal Mine and Rail Project, Adani Mining Pty Ltd 2012

• Derived From Alpha Coal Project Environmental Impact Statement

• Derived From Queensland petroleum exploration data - QPED

• Derived From GAL AWRA-L Model v01

• Derived From National Surface Water sites Hydstra

• Derived From Galilee gauge contributing area

• Derived From GAL SW Quantiles Interpolation for IMIA Database

• Derived From Queensland groundwater dependent ecosystems

• Derived From BA ALL Assessment Units 1000m 'super set' 20160516_v01

• Derived From Node catchment for Galilee surface water modelling

• Derived From BA ALL Assessment Units 1000m Reference 20160516_v01

• Derived From Stream gauges within Galilee surface water modelling domain

• Derived From Biodiversity status of pre-clearing and remnant regional ecosystems - South East Qld

• Derived From Surface Geology of Australia, 1:2 500 000 scale, 2012 edition

• Derived From Landscape classification of the Galilee preliminary assessment extent

• Derived From Three-dimensional visualisation of the Great Artesian Basin - GABWRA

• Derived From Kevin's Corner Project Environmental Impact Statement

• Derived From Galilee Hydrological Response Variable (HRV) model

• Derived From Galilee surface water modelling nodes

• Derived From QLD Department of Natural Resources and Mines Groundwater Database Extract 20142808

• Derived From China First Galilee Coal Project Environmental Impact Assessment

• Derived From GAL GW Quantile Interpolation 20161013

• Derived From Queensland Geological Digital Data - Detailed state extent, regional. November 2012